NIBCO® PEX-b tubing is high density polyethylene cross-linked using the Silane method. This creates the highest quality PEX tubing, which exhibits superior mechanical properties. NIBCO® PEX-b shape memory assures that the piping retains its round, straight tubal shape from the cross-link process. Yet it is pliable and easy to handle, whether it's in stick, spool or coil. It is quick and easy to install requiring fewer fittings, with no torch, flame, or solvent cement. In addition, NIBCO® PEX-b is chlorine-resistant, corrosion-resistant, freeze-resistant and abrasion-resistant and suitable for recirculating applications. The excellent thermal properties of PEX-b means hot water stays hot and cold water stays cold. In addition, the insulating properties of PEX-b eliminate the noise and vibration from water hammer. NIBCO® PEX-b tubing, fittings, valves, and manifolds are designed to be used as a complete system, and are backed by a NIBCO INC. limited warranty.